#include <stdio.h>
#include <unistd.h>

void main()
{
	pid_t p = vfork();
	if(p == 0)
	{
		printf("child begin\n");
		execl("/bin/ls","ls","-l","/",NULL);
		printf("child end\n");
	}
	printf("parent begin\n");
	printf("parent end\n");
}
